Seamus' whopping catch will join these two other catches on the Razza Bar and Bistro wall. Photo / Supplied
Razza Bar and Bistro employee Sean Colenso told Stuff "it was the biggest brown trout I have ever seen".
For Seamus' catch to officially break the record, it would need to go through a number of processes and the fisherman would need to come forward and be named.
Central South Island Fish and Game field officer Rhys Adams revealed the scales would have to be verified.
The Mackenzie canals are known for large fish, with Colenso telling Stuff he believes there'd be bigger fish in the future as they sit at the bottom of the river eating food from the salmon farm.